Please follow the solution provided by Robert:
Hello, I meet the same problem as described above. I followed the instructions as described, however nothing will be solved. The result persists: 2 policy thicks necessary during registration. It seems that once the selectbox is set on enable, there is no way back ? Please find attached screenshots for this situation.
Further, I enabled the facebook selectbox in the same tools-privacy & rules area. I also edited the button in phrases-facebook. However, nothing happened. What result can I expect to obtain the facebook login for my forum-members ? I attached screenshots from my actions.
Thanks for your help to finalise my forum.